That is a huge number (compared to my neighboring state of Arizona, which only has around ten). What is surprising is that there is not another regular zoo besides Los Angeles Zoo in the L.A. area. As I have stated on other threads, the zoo is crowded on busy days to the point of being totally unenjoyable for anyone. There is no question in my mind that a major population center like San Fernando Valley or San Gabriel Valley could support a zoo.
One fact about the Los Angeles Zoo that is a bit of a joke is that the hours are 10-5 daily. That is a late opening for a major metropolitan zoo, plus the website states that "the zoo starts putting animals in for the night at 4 p.m.". Usually in these cases the short hours relate to staffing issues, but for a zoo located in a fantastic climate it is very disappointing. Also, many animals are outside from 10-4 and then spend the other 18 hours locked in their smaller holding zones. Why doesn't the zoo open at 9:00 and remain open until 6:00-7:00 at night? More hours for workers but also more hours for families to spend tons of cash...and way better for the animals.
In regards to your comment about Arizona having 10 zoos, you might want to just about double that number!
OdySea Aquarium - opens this year
Dolpinaris - opens this year
Plus......
17 Arizona Zoos:
Arizona-Sonora Desert Museum (Tucson)*
Bearizona (Williams)
Butterfly Wonderland (Scottsdale)
Camel Farm (Yuma)
Grand Canyon Deer Farm (Williams)
Heritage Park Zoological Sanctuary (Prescott)
Keepers of the Wild (Valentine)
Navajo Nation Zoo (Window Rock)
Oasis Sanctuary (Cascabel)
Out of Africa Wildlife Park (Camp Verde)
Phoenix Herpetological Society (Scottsdale)
Phoenix Zoo (Phoenix)*
Reid Park Zoo (Tucson)*
Sea Life Arizona (Tempe)
Southwest Wildlife Conservation Center (Scottsdale)
Superstition Serpentarium (Apache Junction)
Wildlife World Zoo (Litchfield Park)
* 3 zoos in Arizona are AZA-accredited (a surprisingly low number)
I've visited 12 of these 17 zoos